package com.atguigu.conditional;

import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.context.annotation.Condition;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.core.env.Environment;
import org.springframework.core.type.AnnotatedTypeMetadata;

/**
 * @author : wenchao.long
 * @date : Created in 2020/11/14 10:49:38 周六
 * @description : linux系统
 */
public class LinuxConditional implements Condition {
    /**
     * @param context  判断条件能使用的上下文(环境)
     * @param metadata 注释信息
     * @return boolean
     */
    @Override
    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
        // 1. 能获取到IOC使用的beanFactory
        ConfigurableListableBeanFactory beanFactory = context.getBeanFactory();
        // 2. 获取类加载器
        ClassLoader classLoader = context.getClassLoader();
        // 3. 获取当前环境信息
        Environment environment = context.getEnvironment();
        // 4. 获取到bean定义的注册类
        BeanDefinitionRegistry registry = context.getRegistry();
        // 可以判断容器中的bean注册情况，也可以给容器中注册bean
        boolean definition = registry.containsBeanDefinition("person");
        String property = environment.getProperty("os.name");
        return (property != null && property.contains("Linux")) || definition;
    }
}
